词根：degrade
degrading 可耻的；丧失体面的；不名誉的
degradation 退化；降格，降级；堕落
degrader 降能器
degrading 退化（degrade的ing形式）；减少；降低…的身份
degrade 降级，降低；退化
degrade 贬低；使……丢脸；使……降级；使……降解
1.Within four, they are degraded completely.
四个月后，它们将被完全降解。
2.Restricting the expansion to degraded land would achieve a huge mitigation.
将种植园的扩张限制在土地退化区域内，可以大幅度削减碳排放。
3.Only a small portion of plastic bags could be thoroughly degraded.
只有一小部份的塑料袋是可被彻底降解的。
4.This helps to quickly recover the degraded performance.
这有助于迅速恢复下降的性能。
5.Not merely had she degraded herself; she had degraded him.
她不仅贬低了自己，也贬低了他。
6.Surely only the most degraded, low-minded people, he claimed, could produce this kind of news.
他声称毫无疑问只有极端卑鄙，低俗的人，才可能制造这样的新闻。